Precision Seamless 40Cr ,12Cr1MoV Steel hydraulic cylinder Tube For Automobile Cylinder
Commodity: precision cylinder steel tube
Standard specification&material: DIN2391-2 ST52,ST45,EN10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4,ASTM A519 SAE1020,SAE1026,SAE1045,SAE4130,SAE4140,etc.
Size range:40mm*30mm - 480mm*450mm
Manufacture method: cold rolled, hydraulic cold drawn
Delivery condition:
BK BKW BKS GBK NBK
+C +LC +SR +A +N
Internal surface treatment method: honing,skiving and roller burnishing
OD tolerance: as per EN10305-1 or DIN2391-1
ID tolerance: H7,H8,H9,H10 or given by customer.
W.T tolerance(eccentricity): +/-5%
Bore roughness(Ra): 0.25um max for skived and roller burnished tube, 0.4um max for honed tube.
Chemical composition requirement of E355 material:
Element C Si Mn P S
Content (%) 0.22% max 0.55% max 1.60% max 0.025% max 0.025% max
Mechanical properties of E355 tubes:
BK BKW BKS GBK NBK
Tensile strength: 640 Mpa min 580 Mpa min 580 Mpa min 450 Mpa min 490Mpa-630Mpa
Yield strength - - 450 Mpa min - 355 Mpa min
Elongation 4% min 7% min 10% min 22% min 22% min
Specifications:
Inner Diameter: 30- 1000 mm
Outer Diameter: 40- 1200 mm
Wall Thickness: 2.5- 55 mm
Main Material: 20#(St45), 45#(CK45), 16Mn(St52), 25Mn, 27SiMn
Standard: GB/T8713-88, ISO4394/1-1980(E)
(Can be customerized according to your needs.)
service:
External machining or external polishing service can be provided.
End machining service can be provided.
Products pictures:
Equipments:
customers visit factory
